S-90452A125 Washers for Square-Neck Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for humid or chemically aggressive environments.
• Precise square hole design ensures secure fit and prevents rotation on 1/2" screws, enhancing assembly stability.
• Optimized load distribution from the 1.125" outer diameter, reducing surface pressure and material stress.
• Consistent dimensional accuracy with 0.617" inside width and 0.055-0.065" thickness for reliable, repeatable installations.
• Compliance with stringent environmental regulations including RoHS 3 and REACH, ensuring safe use in regulated industries.
• Durable performance in demanding applications without rated hardness limitations, suitable for various industrial loads.
• Inch system compatibility simplifies sourcing and replacement in North American and global metric-conversion projects.

Professional Applications & Engineering Value

This square hole washer is engineered to address common challenges in machinery assembly, construction, and automotive sectors where vibration and corrosion compromise fastener integrity. The 18-8 stainless steel material provides excellent resistance to rust and chemical exposure, extending service life in outdoor or marine settings. The square hole design locks securely onto 1/2" screws, preventing loosening under dynamic loads and reducing maintenance frequency. With an OD of 1.125" and precise 0.617" inside width, it delivers uniform stress distribution, protecting sensitive components from deformation. Ideal for heavy-duty equipment, structural frameworks, and plumbing systems, this washer ensures reliable performance while meeting RoHS and REACH compliance for environmentally conscious procurement.

Specification Summary & Compliance

Manufactured to inch system standards, this washer features an OD of 1.125", inside width of 0.617", and thickness range of 0.055-0.065" for consistent fit with 1/2" screws. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, affirming its suitability for use in products distributed globally. The 18-8 stainless steel construction ensures durability without specific hardness ratings, supporting applications requiring corrosion resistance and mechanical reliability.